Element 30, zinc, Zn, is a bluish-white metal. Zinc is a biologically
essential trace element for the growth of animals, a zinc deficiency
requires 5¯% more food to gain the same weight. Zinc oxide has unusual
electrical, thermal, optical, and solid-state properties. An alloy of
zinc-aluminum exhibits superplasticity. Zinc is used to galvanize
other metals such as iron to prevent corrosion. Zn is superconductive
below 0.85 K.